A light triplet boson and Higgs-to-diphoton in supersymmetric type II seesaw

TL;DR

This paper investigates how a light triplet boson in supersymmetric type II seesaw models can influence Higgs to diphoton decay and assesses its detectability at the LHC through specific multi-lepton signals.

Contribution

It explores the parameter space where a light triplet boson affects Higgs decay and proposes experimental signatures for future LHC searches.

Findings

Light triplet boson can significantly enhance Higgs to diphoton decay.

Feasibility of observing same-sign di-lepton and tetra-lepton signals at LHC.

Constraints from LHC7 limit the parameter space for triplet boson properties.

Abstract

The supersymmetric type II seesaw may leave a limit where a triplet boson along with the standard Higgs boson remains light. Working in this limit with small triplet vacuum expectation vlaues, we explore how much such a light triplet boson can contribute to the Higgs boson decay to diphoton, and analyze the feasibility to observe it through same-sign di-lepton and tetra-lepton signals in the forthcoming LHC run after setting a LHC7 limit in a simplified parameter space of the triplet vaccum expectation value and the doubly charged boson mass.